CRY2 and type 2 diabetes mellitus: Similarly, in the T2DM-ADSC group, PER1, PER2, PER3, CRY1, CRY2, and ARNTL (BMAL1) showed daily fluctuations, whereas daily fluctuations were not noted for CLOCK1, CLOCK2, CLOCK3, and CLOCK4 (Figure 2b).